.TH "std::chrono" 3cxx "Sun Jan 8 2023" "libstdc++" \" -*- nroff -*-
.ad l
.nh
.SH NAME
std::chrono \- ISO C++ 2011 namespace for date and time utilities\&.  

.SH SYNOPSIS
.br
.PP
.SS "Classes"

.in +1c
.ti -1c
.RI "struct \fBduration\fP"
.br
.RI "\fCchrono::duration\fP represents a distance between two points in time "
.ti -1c
.RI "struct \fBduration_values\fP"
.br
.RI "duration_values "
.ti -1c
.RI "struct \fBsteady_clock\fP"
.br
.RI "Monotonic clock\&. "
.ti -1c
.RI "struct \fBsystem_clock\fP"
.br
.RI "System clock\&. "
.ti -1c
.RI "struct \fBtime_point\fP"
.br
.RI "\fCchrono::time_point\fP represents a point in time as measured by a clock "
.ti -1c
.RI "struct \fBtreat_as_floating_point\fP"
.br
.RI "treat_as_floating_point "
.in -1c
.SS "Typedefs"

.in +1c
.ti -1c
.RI "using \fBdays\fP = \fBduration\fP< int64_t, \fBratio\fP< 86400 > >"
.br
.RI "days "
.ti -1c
.RI "using \fBfile_clock\fP = ::std::filesystem::__file_clock"
.br
.ti -1c
.RI "template<typename _Duration > using \fBfile_time\fP = \fBtime_point\fP< file_clock, _Duration >"
.br
.ti -1c
.RI "using \fBgps_seconds\fP = \fBgps_time\fP< \fBseconds\fP >"
.br
.ti -1c
.RI "template<typename _Duration > using \fBgps_time\fP = \fBtime_point\fP< gps_clock, _Duration >"
.br
.ti -1c
.RI "using \fBhigh_resolution_clock\fP = \fBsystem_clock\fP"
.br
.RI "Highest-resolution clock\&. "
.ti -1c
.RI "using \fBhours\fP = \fBduration\fP< int64_t, \fBratio\fP< 3600 > >"
.br
.RI "hours "
.ti -1c
.RI "using \fBlocal_days\fP = \fBlocal_time\fP< \fBdays\fP >"
.br
.ti -1c
.RI "using \fBlocal_seconds\fP = \fBlocal_time\fP< \fBseconds\fP >"
.br
.ti -1c
.RI "template<typename _Duration > using \fBlocal_time\fP = \fBtime_point\fP< local_t, _Duration >"
.br
.ti -1c
.RI "using \fBmicroseconds\fP = \fBduration\fP< int64_t, \fBmicro\fP >"
.br
.RI "microseconds "
.ti -1c
.RI "using \fBmilliseconds\fP = \fBduration\fP< int64_t, \fBmilli\fP >"
.br
.RI "milliseconds "
.ti -1c
.RI "using \fBminutes\fP = \fBduration\fP< int64_t, \fBratio\fP< 60 > >"
.br
.RI "minutes "
.ti -1c
.RI "using \fBmonths\fP = \fBduration\fP< int64_t, \fBratio\fP< 2629746 > >"
.br
.RI "months "
.ti -1c
.RI "using \fBnanoseconds\fP = \fBduration\fP< int64_t, \fBnano\fP >"
.br
.RI "nanoseconds "
.ti -1c
.RI "using \fBseconds\fP = \fBduration\fP< int64_t >"
.br
.RI "seconds "
.ti -1c
.RI "using \fBsys_days\fP = \fBsys_time\fP< \fBdays\fP >"
.br
.ti -1c
.RI "using \fBsys_seconds\fP = \fBsys_time\fP< \fBseconds\fP >"
.br
.ti -1c
.RI "template<typename _Duration > using \fBsys_time\fP = \fBtime_point\fP< \fBsystem_clock\fP, _Duration >"
.br
.ti -1c
.RI "using \fBtai_seconds\fP = \fBtai_time\fP< \fBseconds\fP >"
.br
.ti -1c
.RI "template<typename _Duration > using \fBtai_time\fP = \fBtime_point\fP< tai_clock, _Duration >"
.br
.ti -1c
.RI "using \fButc_seconds\fP = \fButc_time\fP< \fBseconds\fP >"
.br
.ti -1c
.RI "template<typename _Duration > using \fButc_time\fP = \fBtime_point\fP< utc_clock, _Duration >"
.br
.ti -1c
.RI "using \fBweeks\fP = \fBduration\fP< int64_t, \fBratio\fP< 604800 > >"
.br
.RI "weeks "
.ti -1c
.RI "using \fByears\fP = \fBduration\fP< int64_t, \fBratio\fP< 31556952 > >"
.br
.RI "years "
.in -1c
.SS "Functions"

.in +1c
.ti -1c
.RI "template<typename _Rep , typename _Period > constexpr \fBenable_if_t\fP< \fBnumeric_limits\fP< _Rep >::is_signed, \fBduration\fP< _Rep, _Period > > \fBabs\fP (\fBduration\fP< _Rep, _Period > __d)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Rep , typename _Period > constexpr __enable_if_is_duration< _ToDur > \fBceil\fP (const \fBduration\fP< _Rep, _Period > &__d)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Clock , typename _Dur > constexpr \fBenable_if_t\fP< __is_duration< _ToDur >::value, \fBtime_point\fP< _Clock, _ToDur > > \fBceil\fP (const \fBtime_point\fP< _Clock, _Dur > &__tp)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Rep , typename _Period > constexpr __enable_if_is_duration< _ToDur > \fBduration_cast\fP (const \fBduration\fP< _Rep, _Period > &__d)"
.br
.RI "duration_cast "
.ti -1c
.RI "template<typename _ToDur , typename _Rep , typename _Period > constexpr __enable_if_is_duration< _ToDur > \fBfloor\fP (const \fBduration\fP< _Rep, _Period > &__d)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Clock , typename _Dur > constexpr \fBenable_if_t\fP< __is_duration< _ToDur >::value, \fBtime_point\fP< _Clock, _ToDur > > \fBfloor\fP (const \fBtime_point\fP< _Clock, _Dur > &__tp)"
.br
.ti -1c
.RI "constexpr bool \fBis_am\fP (const \fBhours\fP &__h) noexcept"
.br
.ti -1c
.RI "constexpr bool \fBis_pm\fP (const \fBhours\fP &__h) noexcept"
.br
.ti -1c
.RI "constexpr \fBhours\fP \fBmake12\fP (const \fBhours\fP &__h) noexcept"
.br
.ti -1c
.RI "constexpr \fBhours\fP \fBmake24\fP (const \fBhours\fP &__h, bool __is_pm) noexcept"
.br
.ti -1c
.RI "template<typename _CharT , typename _Traits , typename _Rep , typename _Period > \fBbasic_ostream\fP< _CharT, _Traits > & \fBoperator<<\fP (\fBstd::basic_ostream\fP< _CharT, _Traits > &__os, const \fBduration\fP< _Rep, _Period > &__d)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Rep , typename _Period > constexpr \fBenable_if_t\fP< __and_< __is_duration< _ToDur >, __not_< \fBtreat_as_floating_point\fP< typename _ToDur::rep > > >::value, _ToDur > \fBround\fP (const \fBduration\fP< _Rep, _Period > &__d)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Clock , typename _Dur > constexpr \fBenable_if_t\fP< __and_< __is_duration< _ToDur >, __not_< \fBtreat_as_floating_point\fP< typename _ToDur::rep > > >::value, \fBtime_point\fP< _Clock, _ToDur > > \fBround\fP (const \fBtime_point\fP< _Clock, _Dur > &__tp)"
.br
.ti -1c
.RI "template<typename _ToDur , typename _Clock , typename _Dur > constexpr \fBenable_if\fP< __is_duration< _ToDur >::value, \fBtime_point\fP< _Clock, _ToDur > >::type \fBtime_point_cast\fP (const \fBtime_point\fP< _Clock, _Dur > &__t)"
.br
.RI "time_point_cast "
.in -1c
.PP
.RI "\fB\fP"
.br

.in +1c
.in +1c
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr \fBcommon_type\fP< \fBduration\fP< _Rep1, _Period1 >, \fBduration\fP< _Rep2, _Period2 > >::type \fBoperator\-\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.RI "The difference between two durations\&. "
.in -1c
.in -1c
.PP
.RI "\fB\fP"
.br

.in +1c
.in +1c
.ti -1c
.RI "template<typename _Rep1 , typename _Rep2 , typename _Period > constexpr \fBduration\fP< __common_rep_t< _Rep2, _Rep1 >, _Period > \fBoperator*\fP (const _Rep1 &__s, const \fBduration\fP< _Rep2, _Period > &__d)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period , typename _Rep2 > constexpr \fBduration\fP< __common_rep_t< _Rep1, __disable_if_is_duration< _Rep2 > >, _Period > \fBoperator/\fP (const \fBduration\fP< _Rep1, _Period > &__d, const _Rep2 &__s)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr \fBcommon_type\fP< _Rep1, _Rep2 >::type \fBoperator/\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period , typename _Rep2 > constexpr \fBduration\fP< __common_rep_t< _Rep1, __disable_if_is_duration< _Rep2 > >, _Period > \fBoperator%\fP (const \fBduration\fP< _Rep1, _Period > &__d, const _Rep2 &__s)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr \fBcommon_type\fP< \fBduration\fP< _Rep1, _Period1 >, \fBduration\fP< _Rep2, _Period2 > >::type \fBoperator%\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.in -1c
.in -1c
.PP
.RI "\fB\fP"
.br

.in +1c
.in +1c
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool \fBoperator<\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool \fBoperator!=\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool \fBoperator<=\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool \fBoperator>\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool \fBoperator>=\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.in -1c
.in -1c
.PP
.RI "\fB\fP"
.br

.in +1c
.in +1c
.ti -1c
.RI "template<typename _Rep1 , typename _Period1 , typename _Clock , typename _Dur2 > constexpr \fBtime_point\fP< _Clock, typename \fBcommon_type\fP< \fBduration\fP< _Rep1, _Period1 >, _Dur2 >::type > \fBoperator+\fP (const \fBduration\fP< _Rep1, _Period1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.RI "Adjust a time point forwards by the given duration\&. "
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Rep2 , typename _Period2 > constexpr \fBtime_point\fP< _Clock, typename \fBcommon_type\fP< _Dur1, \fBduration\fP< _Rep2, _Period2 > >::type > \fBoperator\-\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBduration\fP< _Rep2, _Period2 > &__rhs)"
.br
.RI "Adjust a time point backwards by the given duration\&. "
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr \fBcommon_type\fP< _Dur1, _Dur2 >::type \fBoperator\-\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.RI "The difference between two time points (as a duration) "
.in -1c
.in -1c
.PP
.RI "\fB\fP"
.br

.in +1c
.in +1c
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool \fBoperator!=\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool \fBoperator<\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool \fBoperator<=\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool \fBoperator>\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.ti -1c
.RI "template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool \fBoperator>=\fP (const \fBtime_point\fP< _Clock, _Dur1 > &__lhs, const \fBtime_point\fP< _Clock, _Dur2 > &__rhs)"
.br
.in -1c
.in -1c
.SS "Variables"

.in +1c
.ti -1c
.RI "constexpr month \fBApril\fP"
.br
.ti -1c
.RI "constexpr month \fBAugust\fP"
.br
.ti -1c
.RI "constexpr month \fBDecember\fP"
.br
.ti -1c
.RI "constexpr month \fBFebruary\fP"
.br
.ti -1c
.RI "constexpr weekday \fBFriday\fP"
.br
.ti -1c
.RI "template<typename _Tp > constexpr bool \fBis_clock_v\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< file_clock >\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< gps_clock >\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< steady_clock >\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< system_clock >\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< tai_clock >\fP"
.br
.ti -1c
.RI "template<> constexpr bool \fBis_clock_v< utc_clock >\fP"
.br
.ti -1c
.RI "constexpr month \fBJanuary\fP"
.br
.ti -1c
.RI "constexpr month \fBJuly\fP"
.br
.ti -1c
.RI "constexpr month \fBJune\fP"
.br
.ti -1c
.RI "constexpr last_spec \fBlast\fP"
.br
.ti -1c
.RI "constexpr month \fBMarch\fP"
.br
.ti -1c
.RI "constexpr month \fBMay\fP"
.br
.ti -1c
.RI "constexpr weekday \fBMonday\fP"
.br
.ti -1c
.RI "constexpr month \fBNovember\fP"
.br
.ti -1c
.RI "constexpr month \fBOctober\fP"
.br
.ti -1c
.RI "constexpr weekday \fBSaturday\fP"
.br
.ti -1c
.RI "constexpr month \fBSeptember\fP"
.br
.ti -1c
.RI "constexpr weekday \fBSunday\fP"
.br
.ti -1c
.RI "constexpr weekday \fBThursday\fP"
.br
.ti -1c
.RI "template<typename _Rep > constexpr bool \fBtreat_as_floating_point_v\fP"
.br
.ti -1c
.RI "constexpr weekday \fBTuesday\fP"
.br
.ti -1c
.RI "constexpr weekday \fBWednesday\fP"
.br
.in -1c
.SH "Detailed Description"
.PP 
ISO C++ 2011 namespace for date and time utilities\&. 
.SH "Author"
.PP 
Generated automatically by Doxygen for libstdc++ from the source code\&.